learning standards and aligned the content to the standards from National Science Teachers Association, the National Council of Teachers of Mathematics, and the state standards and HSEEs of CA, FL, GA, MA, MS, MI, MO, NY, PA, TX, VA and Washington DC.

The HSEES system was established by the Agency for Toxic Substances and Disease Registry (ATSDR) in 1990 to focus on the public health consequences rather than the environmental effect of acute hazardous substance releases.

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